Japan Meteorological Agency (JMA)
WMO/GAW Dobson Calibration System

To maintain the accuracy of Dobson spectrophotometers in the WMO/GAW ozone observing network, it is important to ensure traceability through intercomparison and calibration with the world standard and the regional standard Dobson spectrophotometers. The national standard instruments are calibrated by these regional standards for each at the Regional Dobson Calibration Centres (RDCCs).

Intercomparisons for Regional Standard (D116)
The regional standard Dobson 116 have been calibrated through intercomparisons against the world standard as follows.
Year Place
1977 Boulder / USA
1984 Melbourne / Australia
1989 Maunaloa / USA
1992 Boulder / USA
1995 Arosa / Switzerland
1998 Boulder / USA
2001 Maunaloa / USA
2004 Boulder / USA
2007 Boulder / USA
2010 Maunaloa / USA
2013 Boulder / USA

Last Updated: 2012.03.29